Just create a collection and use the following query :
select SMS_R_SYSTEM.ResourceID,SMS_R_SYSTEM.ResourceType,SMS_R_SYSTEM.Name,
SMS_R_SYSTEM.SMSUniqueIdentifier,SMS_R_SYSTEM.ResourceDomainORWorkgroup,
SMS_R_SYSTEM.Client from SMS_R_System where Client = 0 or Client is NULL and
SMSAssignedSites is NULL
Maheshkumar S Tiwari edited Revision 1. Comment: Added Tag
Maheshkumar S Tiwari edited Original. Comment: Added Tag